Energy stability in recirculating, energy-recovering linacs
Recirculating, energy-recovering linacs can be used as driver accelerators for high power FELs. Instabilities which arise from fluctuations of the cavity fields are investigated. Energy changes can cause beam loss on apertures, or, when coupled to M{sub 56}, phase oscillations. Both effects change the beam induced voltage in the cavities and can lead to unstable variations of the accelerating field. Stability analysis for small perturbations from equilibrium is performed and threshold currents are determined. Furthermore, the analytical model is extended to include amplitude and phase feedback, with the transfer function in the feedback path presently modeled as a low-pass filter. The feedback gain and bandwidth required for stability are calculated for the high power UV FEL proposed for construction at CEBAF. 4 refs.
- Research Organization:
- Continuous Electron Beam Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 267564
- Report Number(s):
- DOE/ER/40150-343; CEBAF-PR-95-032; ON: DE96006242
- Resource Relation:
- Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
Similar Records
Energy stability in recirculating, energy-recovering linacs in the presence of a FEL
Analysis of the FEL-RF interaction in recirculating energy-recovering linacs with an FEL